Note 9 - Stock-Based Compensation (Details) - Summary of Stock Option Activity (USD $)	12 Months Ended
	Apr. 27, 2013		Apr. 30, 2011
Summary of Stock Option Activity [Abstract]
Options outstanding, beginning of year	512,620
Options outstanding, beginning of year (in Dollars per share)	$ 7.24	[1]
Granted	2,000		301,500
Granted (in Dollars per share)	$ 8.39	[1]
Exercised	(40,240)
Exercised (in Dollars per share)	$ 5.95	[1]
Cancelled	(32,570)
Cancelled (in Dollars per share)	$ 4.90	[1]
Options outstanding, end of year	441,810
Options outstanding, end of year (in Dollars per share)	$ 6.86	[1]
Options exercisable, end of year	265,088
Options exercisable, end of year (in Dollars per share)	$ 5.63	[1]

[1] Weighted average exercise price